diff --git a/specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/afdx.json b/specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/afdx.json
index 9c4c4813f70f..d6b245194899 100644
--- a/specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/afdx.json
+++ b/specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/afdx.json
@@ -2856,12 +2856,12 @@
             "type": "string"
           },
           {
-            "name": "securityPolicyProperties",
+            "name": "securityPolicUpdateProperties",
             "in": "body",
             "description": "Security policy update properties",
             "required": true,
             "schema": {
-              "$ref": "#/definitions/SecurityPolicyProperties"
+              "$ref": "#/definitions/SecurityPolicyUpdateParameters"
             }
           },
           {
@@ -4228,6 +4228,7 @@
     },
     "SecurityPolicyProperties": {
       "description": "The json object that contains properties required to create a security policy",
+      "type": "object",
       "allOf": [
         {
           "$ref": "#/definitions/AFDStateProperties"
@@ -4241,11 +4242,31 @@
         },
         "parameters": {
           "description": "object which contains security policy parameters",
-          "$ref": "#/definitions/SecurityPolicyParameters"
+          "$ref": "#/definitions/SecurityPolicyPropertiesParameters"
+        }
+      }
+    },
+    "SecurityPolicyUpdateParameters": {
+      "description": "The JSON object containing security policy update parameters.",
+      "type": "object",
+      "properties": {
+        "properties": {
+          "x-ms-client-flatten": true,
+          "$ref": "#/definitions/SecurityPolicyUpdateProperties"
+        }
+      }
+    },
+    "SecurityPolicyUpdateProperties": {
+      "description": "The json object that contains properties required to update a security policy",
+      "type": "object",
+      "properties": {
+        "parameters": {
+          "description": "object which contains security policy parameters",
+          "$ref": "#/definitions/SecurityPolicyPropertiesParameters"
         }
       }
     },
-    "SecurityPolicyParameters": {
+    "SecurityPolicyPropertiesParameters": {
       "description": "The json object containing security policy parameters",
       "discriminator": "type",
       "required": [
@@ -4272,7 +4293,7 @@
       "type": "object",
       "allOf": [
         {
-          "$ref": "#/definitions/SecurityPolicyParameters"
+          "$ref": "#/definitions/SecurityPolicyPropertiesParameters"
         }
       ],
       "properties": {
diff --git a/specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/examples/SecurityPolicies_Patch.json b/specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/examples/SecurityPolicies_Patch.json
index 49d4564ade9b..c5d6a525836e 100644
--- a/specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/examples/SecurityPolicies_Patch.json
+++ b/specification/cdn/resource-manager/Microsoft.Cdn/stable/2021-06-01/examples/SecurityPolicies_Patch.json
@@ -6,26 +6,28 @@
     "profileName": "profile1",
     "securityPolicyName": "securityPolicy1",
     "securityPolicyProperties": {
-      "parameters": {
-        "type": "WebApplicationFirewall",
-        "wafPolicy": {
-          "id": "/subscriptions/subid/resourcegroups/RG/providers/Microsoft.Network/frontdoorwebapplicationfirewallpolicies/wafTest"
-        },
-        "associations": [
-          {
-            "domains": [
-              {
-                "id": "/subscriptions/subid/resourcegroups/RG/providers/Microsoft.Cdn/profiles/profile1/afddomains/testdomain1"
-              },
-              {
-                "id": "/subscriptions/subid/resourcegroups/RG/providers/Microsoft.Cdn/profiles/profile1/afddomains/testdomain2"
-              }
-            ],
-            "patternsToMatch": [
-              "/*"
-            ]
-          }
-        ]
+      "properties": {
+        "parameters": {
+          "type": "WebApplicationFirewall",
+          "wafPolicy": {
+            "id": "/subscriptions/subid/resourcegroups/RG/providers/Microsoft.Network/frontdoorwebapplicationfirewallpolicies/wafTest"
+          },
+          "associations": [
+            {
+              "domains": [
+                {
+                  "id": "/subscriptions/subid/resourcegroups/RG/providers/Microsoft.Cdn/profiles/profile1/afddomains/testdomain1"
+                },
+                {
+                  "id": "/subscriptions/subid/resourcegroups/RG/providers/Microsoft.Cdn/profiles/profile1/afddomains/testdomain2"
+                }
+              ],
+              "patternsToMatch": [
+                "/*"
+              ]
+            }
+          ]
+        }
       }
     }
   },